• 한국소성가공학회:학술대회논문집
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• 한국소성가공학회 2007년도 추계학술대회 논문집
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• pp.21-24
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• 2007

This paper deals with introduction of testing equipments for the evaluation of dynamic tensile characteristics of auto-body steel sheets and the crashworthiness of auto-body members. The servo-hydraulic high speed material testing machine was developed for tensile tests at the intermediate strain rate to obtain the tensile material properties at the strain rate under 500/sec. The split Hopkinson bar apparatus using the elastic wave was developed for dynamic material characteristics at the high strain rate ranged from 1,000 to 10,000/sec. The servo-hydraulic high speed crash testing machine is the equipment for the evaluation of the collapse load and crashworthiness of auto-body members. High speed carrying truck crashes to specimen with the maximum velocity of 17 m/sec.

• Toxicological Research
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• 제25권3호
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• pp.132-139
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• 2009

The toxicity test of ammonium persulfate was conducted to ensure of its potential toxic effects according to the single-dose acute oral toxicity study (OECD Guideline 423) and 90-day repeated dose sub-chronic oral toxicity study guideline (OECD Guideline 408) for establishing national chemical management system, and matching in the Globally Harmonized Classification System (GHS) category. In acute oral toxicity study, pasty stool, perineal contamination and temporary body weight decrease were observed after dosing 1st and 2nd challenge (300 mg/kg body weight). All test animals were dead within 6 hours after dosing at 3rd challenge (2000 mg/kg body weight). Therefore, the GHS class of test substance is considered class 4. In sub-chronic toxicity study, body weight changes, food consumptions, hematological, biochemical and pathological examination did not show any noticeable and significant differences between the administered (5, 20, 80 mg/kg body weight) and control (vehicle only) group animals. Based on these results, the no observed adverse effect level (NOAEL) is considered above 80 mg/kg body weight.

• 비파괴검사학회지
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• 제30권3호
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• pp.271-281
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• 2010

Brazing fitting which is one of the aircraft hydraulic power system components is widely used for saving weight and achieving higher reliability. Any inherent defects or damage of fitting can cause system failure and/or physical damage of human body due to highly pressurized fluid. Radiographic testing(RT) technique and additional micro-structure investigation on cut-away surfaces have been accomplished to find out some defect-like-inhomogeneity in the fittings. The radiography results showed that some defect-like-inhomogeneity existed inside body. Additional micro-structure investigation on cut-away surface reveals that the inhomogeneity is due to internal voids. In this study, it can be is said that RT technique can be a useful tool for field acceptance test of hydraulic brazing fitting in short time.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2008년도 춘계학술대회 논문집
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• pp.986-995
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• 2008

This study introduces the testing results of the AL car body which is applied to LRT. The LRT car body is made of aluminum structure materials like a sandwich panel. The static load test was performed to evaluate the structural characteristic and stability of the AL car body. Considering the vertical, compressive, twisting load and 3-point supporting, Bend natural frequency Measurement, Twist natural frequency Measurement type as a testing terms, the structural stability of a car body was evaluated.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2009년도 춘계학술대회 논문집
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• pp.1604-1612
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• 2009

This study introduces comparison the testing results of the AL car body which is applied to FSW and GMAW welding method. The car body is made of aluminum structure materials like a sandwich panel. The static load test was performed to evaluate the structural characteristic and stability of the AL car body. Considering the vertical, compressive, twisting load and 3-point supporting, Bend natural frequency Measurement, Twist natural frequency Measurement type as a testing terms, the structural stability of a car body was evaluated.

• 한국컴퓨터정보학회논문지
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• 제28권3호
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• pp.111-117
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• 2023

구강은 전신건강을 들여다 볼 수 있는 창문이자 많은 유해균이 들어오는 관문이기도 하다. 우리 몸에 있어서 아주 중요한 부분이다. 유전자 검사는 구강 내 세균을 검사하여 빅 데이터 AI 알고리즘 분석을 통해 우리 몸에 발생할 수 있는 전신질환까지 예측하여 예방 관리를 체계적으로 할 수 있다는 가장 큰 장점이 있다. 이에 본 논문은 연구자 가족이 직접 유전자 검사를 수행하여 결과를 도출해 보고자 한다. 본 연구는 2022년 11월 연구자 가족 4명이 서울시에 소재한 예방치과진료실 J치과의원에서 치과의사 1명, 치과위생사 1명에게 사전설명을 듣고 동의서 작성 후 구강검사와 유전자 검사를 수행하였다. 성인은 Dr.^***으로 중·초등학생은 He^***** 제품으로 유전자 검사를 하였다. 현재 우리나라에서 진행하고 있는 유전자 검사는 대상자가 피를 뽑지 않고 비교적 쉽게 접근할 수 있는 장점도 있지만, 시간, 비용 등 한계점도 있다. 그럼에도 불구하고 구강 내 미생물을 통해 전신질환을 예측할 수 있다는 점에서는 높이 평가할 부분이라고 생각한다.

• 한국의류산업학회지
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• 제4권6호
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• pp.544-549
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• 2002

By the movable thermal manikin developed by China Dong Hua university, the laws of clothing thermal insulation influenced by dressing poses are studied. It is found that $I_a$ on nude thermal manikin has no relation to testing pose as a whole (notable level is 5%), while the change of testing pose influences $I_a$ value on parts of body obviously. The testing result $I_{cle}$ on clothed thermal manikin has relation to testing pose. The $I_{cle}$ value of the whole body in seated pose decreases 20 percent compared with that in standing pose (notable level is 1%). In view of heat transmission theory, the reasons are pointed out based on the knowledge of heat transmission.

• 한국자동차공학회논문집
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• 제17권1호
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• pp.96-104
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• 2009

An anatomically detailed elderly human body model is under development. Using the anthropometric database of domestic nation-wide size survey, SizeKorea, a standard size and shape of 50th %tile elderly was constructed. Through the local recruitment process, a male volunteer with 71 years of age, 163cm of height and 63kg of weight has been selected. The exterior (skin) and interior (skeleton and organ) geometries were acquired from whole body 3D laser scan and various medical images such as CT, X-ray, and Ultrasonic of the volunteer. A particular attention has been paid into the combining process of exterior and interior geometries especially for joint articulation positions since they were measured at different postures (sitting vs. supine). A whole ribcage of PMHS which possessed similar anthropometry and age of standard 50th %tile elderly was prepared and dissected for the precise gauge of cortical rib bone thickness distributions. After completing the morphological construction of elderly human body, the finite element modeling will be processed by meshing elements and assigning mechanical properties to various biological tissues which reflect the aging effect.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1986년도 한국자동제어학술회의논문집; 한국과학기술대학, 충남; 17-18 Oct. 1986
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• pp.102-107
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• 1986

This paper presents a new idea to obtain moment of inertia values of an arbitrary shape body by applying inverse modal transformation technique. A multiaxes inertia pendulum apparatus was designed to measure 6 rigid body modes of a test body. A software was developed to calculate inertia properties as well as the location of center of gravity and total mass of the test body from the measured modal data. The developed method was applied to a simple body of which the inertia properties are known then the obtained values were compared with the known values.

• 한국세라믹학회지
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• 제39권11호
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• pp.1048-1054
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• 2002

가소성 소지를 이용하여 세라믹을 성형하는 경우에 소지의 가소성 평가뿐만 아니라 이를 범위 내에서 제어하기 위하여도 가소성을 정량적으로 시험할 필요가 있다. 비록 많은 가소성 측정 장치들이 소개되기는 하였으나, 간편하게 정량적으로 측정할 수 있는 장치는 아직 없다. 본 연구에서는 바이카 침을 변형하여 허니컴 압출성형용 소지의 가소성을 간편하게 정량적으로 비교할 수 있는 장치를 만들었다. 이 장치를 사용하여 3가지 소지의 가소성을 조사하였다. 변형에 대한 저항의 측정에는 직경 2 mm 원주형 침을 사용하였고, 균열이 일어나기 전까지의 변형 량의 측정에는 직경 9.5 mm 구형의 침을 사용하였다. 측정결과 이 소지들의 가소성을 정량적으로 구분할 수 있었으며, 작업성을 평가하는데 유용하였다. 만약 적당한 직경의 원주형 및 구형의 침을 선택한다면 이 장치로 다양한 세라믹 소지의 가소성을 평가할 수 있을 것으로 보인다.